Data disappearing daily!

Within a period of 9 days I have gone through 250MB of data. I have not used the Internet or Facebook for this time period only Whatsapp. It seems impossible for me that data can run out so quickly.<br> I have been contacted previously about my data getting used up so quickly but that was just to sell another product to me. <br> My data runs out so quickly that I end up having to recharge sometimes up to 3 times a week. This is really poor from you as a service provider. <br> Please fix this.<br> I have two contracts with you but if this continues I will have to change my service provider.<br>